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Finding the Fourth Proportional to 125,165.90, 187,790.78 and 40,929.96

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Solution

The fourth proportional to 125,165.90, 187,790.78 and 40,929.96 is: 61,408.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,165.90 : 187,790.78 = 40,929.96 : x
  2. Step 2: Convert to fraction form
    125,165.90/187,790.78 = 40,929.96/x
  3. Step 3: Cross multiply
    125,165.90x = 187,790.78 × 40,929.96
  4. Step 4: Simplify right side
    125,165.90x = 7,686,269,113.77
  5. Step 5: Solve for x
    x = 7,686,269,113.77/125,165.90
  6. Step 6: Final answer
    x = 61,408.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.